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Derivative Instruments and Hedging Activities (Tables)
12 Months Ended
Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Derivative Outstanding
 The following derivatives were outstanding at December 31, 2018:
Property
 
Notional Amount
 
Product
 
LIBOR Rate
 
Maturity
 
Fair Value
Santa Monica Place
 
$
300,000

 
Cap
 
4.00
%
 
12/9/2019
 
$

The Macerich Partnership, L.P.
 
$
400,000

 
Swaps
 
2.85
%
 
9/30/2021
 
$
(4,413
)